<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">点前城市</div>
				<div class="button-list">
						<div class="button-wrapper">
						  <div class="button">{{this.$store.state.city}}</div>
						</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="button-list">
					<div class="button-wrapper"
          :key="item.id"
          v-for="item of hot"
          @click="handleCityClick(item.name)">
						<div class="button">{{item.name}}</div>
					</div>
				</div>
			</div>
			<div class="area"
      v-for="(item,key) of cities"
      :key="key"
      :ref="key">
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="l-item border-topbottom"
          v-for="innerItem of item"
          :key="innerItem.id"
           @click="handleCityClick(innerItem.name)">
            {{innerItem.name}}
					</div>
				</div>
			</div>
		</div>
	</div>
</template>

<script>
	import BScroll from 'better-scroll'
	export default{
		name : 'CityList',
    props:{
      hot:  Array,
      cities: Object,
      letter: String
    },
    methods:{
      handleCityClick( city) {
        //this.$store.dispatch('changeCity',city)
        //改用commit方法
        this.$store.commit('changeCity',city)
        //alert(city)
         this.$router.push('/')
      }
    },
    mounted(){
      this.scroll = new BScroll(this.$refs.wrapper)
    },
    //监听传过来的letter
    watch:{
      letter()  {
        if(this.letter) {
          //因为ref的值拿到的是数组，所以要取他的下标
            const element = this.$refs[this.letter][0]
            //scroll,内置跳转方法传入element便可以跳转
            this.scroll.scrollToElement(element)
          }
        //console.log(this.letter)
      }
    }
	}
</script>

<style lang="stylus">
	@import '~styles/varibles.styl'
	.border-topbottom
		&:before
			border-color: #ccc
		&:after
			border-color: #ccc
	.list
		overflow: hidden
		position: absolute
		top: 1.68rem
		left: 0
		right: 0
		bottom: 0
	.title
		line-height: .54rem
		background: #eee
		padding-left: .2rem
		color: #666
		font-size: .26rem
	.button-list
		overflow: hidden
		padding: .1rem .6rem .1rem .1rem
		.button-wrapper
			float: left
			width: 33.33%
			.button
				margin: .1rem
				padding: .1rem 0
				text-align: center
				border: .02rem solid #ccc
				border-radius: .06rem
	.item-list
		.l-item
			line-height: .76rem
			padding-left: .2rem
</style>
